What is the excess growth of plankton in water due to the presence of nutrients called?

Three water samples namely river water, untreated sewage water and secondary effluent discharged from a sewage treatment…

Which of the following defines the effect of deforestation on the next generation?</h2></div>

<div>Given below are the measures taken to control air pollution in India. Identify the correct statement.<br&g…

In a greenhouse the glass panel lets the light in, but what is not escaped?

'Human activities' are playing main role in causing;<span><br> </span></h2></div>

List any three human activities which would lead to an increase in the carbon dioxide content of air.</h2></div…

List any four factors which determine the amount of dissolved oxygen in water. Explain in brief the harmful effects of n…